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Process for Extraction of Recoverable Rare Earth Elements (REE) Using Organic Acids and Chelating Compounds
Process for Extraction of Recoverable Rare Earth Elements (REE) Using Organic Acids and Chelating Compounds
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机译:使用有机酸和螯合化合物提取可回收稀土元素(REE)的工艺
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摘要
One or more embodiments relates to a process for extracting Rare Earth Elements (REEs) from REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal. In at least one embodiment the process includes contacting the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal with an Organic Acid Solution (OAS) comprising at least one organic acid and at least one ionic salt at a predetermined ambient temperature and predetermined pH; and separating the REE from the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal, forming REE+Yttrium (REY) concentrate.
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